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Aki Helin discovered a use-after-free vulnerability in XPConnect. Anattacker could potentially exploit this to execute arbitrary code with theprivileges of the user invoking Firefox. (CVE-2012-0469)

Atte Kettunen discovered that invalid frees cause heap corruption ingfxImageSurface. If a user were tricked into opening a malicious ScalableVector Graphics (SVG) image file, an attacker could exploit these to causea denial of service via application crash, or potentially execute code withthe privileges of the user invoking Firefox. (CVE-2012-0470)

Anne van Kesteren discovered a potential cross-site scripting (XSS)vulnerability via multibyte content processing errors. With cross-sitescripting vulnerabilities, if a user were tricked into viewing a speciallycrafted page, a remote attacker could exploit this to modify the contents,or steal confidential data, within the same domain. (CVE-2012-0471)

Matias Juntunen discovered a vulnerability in Firefox's WebGLimplementation that potentially allows the reading of illegal video memory.An attacker could possibly exploit this to cause a denial of service viaapplication crash. (CVE-2012-0473)

Jordi Chancel, Eddy Bordi, and Chris McGowen discovered that Firefoxallowed the address bar to display a different website than the one theuser was visiting. This could potentially leave the user vulnerable tocross-site scripting (XSS) attacks. With cross-site scriptingvulnerabilities, if a user were tricked into viewing a specially craftedpage, a remote attacker could exploit this to modify the contents, or stealconfidential data, within the same domain. (CVE-2012-0474)

Simone Fabiano discovered that Firefox did not always send correct originheaders when connecting to an IPv6 websites. An attacker could potentiallyuse this to bypass intended access controls. (CVE-2012-0475)

Masato Kinugawa discovered that cross-site scripting (XSS) injection ispossible during the decoding of ISO-2022-KR and ISO-2022-CN character sets.With cross-site scripting vulnerabilities, if a user were tricked intoviewing a specially crafted page, a remote attacker could exploit this tomodify the contents, or steal confidential data, within the same domain.(CVE-2012-0477)

It was discovered that certain images rendered using WebGL could causeFirefox to crash. If the user were tricked into opening a specially craftedpage, an attacker could exploit this to cause a denial of service viaapplication crash, or potentially execute code with the privileges of theuser invoking Firefox. (CVE-2012-0478)

Mateusz Jurczyk discovered an off-by-one error in the OpenType Sanitizer.If the user were tricked into opening a specially crafted page, an attackercould exploit this to cause a denial of service via application crash, orpotentially execute code with the privileges of the user invoking Firefox.(CVE-2011-3062)

Daniel Divricean discovered a defect in the error handling of JavaScripterrors can potentially leak the file names and location of JavaScript fileson a server. This could potentially lead to inadvertent informationdisclosure and a vector for further attacks. (CVE-2011-1187)

Jeroen van der Gun discovered a vulnerability in the way Firefox handledRSS and Atom feeds. Invalid RSS or ATOM content loaded over HTTPS causedthe location bar to be updated with the address of this content, while themain window still displays the previously loaded content. An attacker couldpotentially exploit this vulnerability to conduct phishing attacks.(CVE-2012-0479)

Update instructions:

The problem can be corrected by updating your system to the followingpackage versions:

Ubuntu 12.04 LTS: firefox 12.0+build1-0ubuntu0.12.04.1

Ubuntu 11.10: firefox 12.0+build1-0ubuntu0.11.10.1

Ubuntu 11.04: firefox 12.0+build1-0ubuntu0.11.04.1

Ubuntu 10.04 LTS: firefox 12.0+build1-0ubuntu0.10.04.1

After a standard system update you need to restart Firefox to makeall the necessary changes.